地表地质构造对综放面开切眼保护煤柱留设及位置的影响

Effect of surface geological structures on the position of open-off cut and setting of coal pillar for fully mechanized caving face

保德煤矿地貌为黄土沟峁、丘陵地貌,五盘区地表对应有梅花沟,与综采工作面呈35°夹角,地表水经保德旧城流入黄河。通过开采前对该区域地质环境条件调查,分析五盘区81503综放面开采诱发的地质灾害对地表的村庄、河流、电视转播塔等地表建(构)筑物的危害程度,经科学计算,在尽可能提高煤炭资源回收率的前提下,对地表重要建(构)筑物设计保护煤柱并对81503采面开切眼位置进行了确定,为类似条件煤矿井下综放面开切眼位置确定提供可靠依据。

The landform of Baode Coal Mine is loess gully and hilly.By investigating the geological environment conditions of the area before mining,the harm degree of geological hazards induced by the mining of No.81503 fully mechanized caving face in fifth mining area to the surface buildings such as villages,rivers and TV transmission towers was analyzed.Based on scientific calculation and on the premise of increasing the recovery rate of coal resources as much as possible,the protective coal pillars for important buildings on the surface were designed and the position of open-off cut in No.81503 mining face was determined,which provides a reliable basis for determining the position of open-off cut in fully mechanized caving face under similar conditions.